AOK
| Arkansas-Oklahoma Railroad | 6 |
AOKX
| Greenbrier Management Services, LLC | 3 |
ARR
| Alaska Railroad | 23 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 2 |
BNSF
| BNSF Railway | 36 |
BOOT
| BOOT | 1 |
BTCX
| Browner Turnout Company | 2 |
BVRY
| Brandywine Valley Railroad Company | 1 |
CN
| Canadian National Railways | 3 |
CO
| Chesapeake & Ohio | 2 |
CP
| Canadian Pacific Railway | 9 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 10 |
CW
| Colorado and Wyoming | 3 |
DODX
| Department Of Defense | 163 |
DRGW
| Denver & Rio Grande Western | 1 |
ENR
| E and N Railway Company Limited | 2 |
FEC
| Florida East Coast | 1 |
FRR
| Falls Road Railroad Company Incorporated | 1 |
FTTX
| TTX Company | 2 |
FURX
| First Union Rail | 1 |
GEDX
| GEDX | 1 |
GIMX
| General American Marks Company | 3 |
HKRX
| HKRX | 1 |
HTTX
| TTX Company | 26 |
IC
| Illinois Central | 1 |
ICE
| Iowa Chicago and Eastern | 6 |
IFRX
| Infinity Rail LLC | 1 |
ITTX
| TTX Company | 24 |
JDIX
| Jim Dobbas Incorporated | 1 |
JTSX
| Joseph Transportation Incorporated | 1 |
JTTX
| TTX Company | 3 |
KRL
| Kasgro Rail Lines | 3 |
LBR
| Lowville and Beaver River Railroad Compa | 1 |
LMIC
| Lake Michigan & Indiana Railroad | 3 |
LTTX
| TTX Company | 4 |
MMTX
| MMTX | 1 |
MNG
| MNG | 1 |
MP
| Missouri Pacific | 7 |
MSPX
| P4 Productions LLC | 1 |
MSTL
| Minneapolis & St Louis | 1 |
MTTX
| TTX Company | 5 |
NBCX
| Nebraska Boiler Co | 1 |
NCPC
| NCPC | 1 |
NOKL
| Northwestern Oklahoma | 2 |
NS
| Norfolk Southern | 2 |
NW
| Norfolk & Western | 2 |
NYC
| New York Central | 2 |
OTTX
| TTX Company | 45 |
PEYX
| Transportation Technology Services Inc | 2 |
PHMX
| P&H Mining Equipment | 3 |
PRR
| Pennsylvania Railroad | 1 |
PTTX
| TTX Company | 18 |
QTTX
| TTX Company | 24 |
QUAX
| Redstreak, LLC | 2 |
RITX
| RITX | 1 |
SNHX
| IND/AG Chemicals Incorporated | 2 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 1 |
SPSX
| Progress Rail Services Corp | 4 |
STTX
| TTX Company | 1 |
TBCX
| Boeing Company | 2 |
TFWX
| TTX COMPANY | 1 |
TOEX
| TOEX | 2 |
TPDX
| TPDX | 53 |
TPOX
| TPOX | 2 |
TTDX
| TTX Company - DOD Service Flats | 1 |
TTEX
| TTX Company - Articulated Flat Cars (TOFC/COFC) | 1 |
TTHX
| TTX Company - Flat Cars | 2 |
TTJX
| TTX Company-Bulkhead Flats | 3 |
TTYX
| TTX Company | 2 |
TZPR
| Tazewell & Peoria Railroad | 1 |
UP
| Union Pacific Railroad Company | 19 |
UPP
| Union Pacific Passenger | 1 |
USAX
| United States Army | 1 |
VT
| Virginia & Truckee | 1 |
WP
| Western Pacific | 1 |
XTTX
| TTX Company | 8 |